(a) 0.002 (b) 0.004 (c) 0.008 (d) 0.016 Answer-b (22)
(a) Protonema (b) Prothallus (c) Proembryo (d) Embryo Ans. a (10)
(a) Pteridophytes (b) Pines (c) Monocots (d) Dicots Ans. a (7)
(a) Gametophyte (b) Sporophyte (c) Both (a) and (b) (d) None of these Ans. b (9)
(a) Total Energy (b) K.E. (c) Angular Velocity (d) Linear Momentum Answer: a (9)
(a) Peristome teeth (b) Annulus (c) Calyptra (d) Operculum Ans. a (5)
(a) Potential energy (b) Kinetic energ (c) Linear momentum (d) Angular momentum Answer:D (10)
(a) Keplers law of areas still holds (b) Keplers law of period still holds (c) Keplers law of areas and period still hold (d) Neither the law of areas, nor the law of period still holds Answer: d (14)
(a) 1032 (b) 1023 (c) 1024 (d) 1043 Answer: a (5)
(a) Tangential velocity is constant (b) Angular velocity is constant (c) Radial velocity is constant (d) Areal velocity is constant Answer: d (17)
(a) Work energy theorem (b) Conservation of linear momentum (c) Conservation of angular momentum (d) Conservation of energy Answer: c (6)
(a) 1.38 (b) 1.383/2 (c) 1.381/2 (d) 1.383 (e) 1.382 Answer:b (6)
(a) T2 ∞ R3 (b) T3 ∞ R2 (c) T2 ∞ (1/R3 ) (d) T3 ∞ (1/ R2 ) Answer: a (3)
(a) 16 L (b) 64 L (c) L/4 (d) 4 L Answer: d (4)
(a) 4.2 years (b) 2.8 years (c) 5.6 years (d) 8.4 years Answer: b (7)
(a) A (b) B (c) C (d) D Answer: c (12)
(a) The time taken in travelling DAB is less than that for BCD (b) The time taken in travelling DAB is greater than that for BCD (c) The time taken in travelling CDA is less than that for ABC (d) …
(a) 53/2 years (b) 52/3years (c) 51/3 years (d) 51/2 years Answer: a (5)
(a) Spirogyra (b) Mucor (c) Moss (d) Both (b) and (c) Ans. c (13)
(a) Copernicus (b) Kepler (c) Galileo (d) None Answer: A (6)
A satellite of mass m is circulating around the earth with constant angular velocity. If radius of the orbit is R0 and mass of the earth M, the angular momentum about the centre of the earth is (a) m√GMR0 …
The largest and the shortest distance of the earth from the sun are r1 and r2 , its distance from the sun when it is at the perpendicular to the major axis of the orbit drawn from the sun (a) …
A metal bar of length L and area of cross-section A is clamped between two rigid supports. For the material of the rod, its Young’s modulus is Y and coefficient of linear expansion is . If the temperature of the …
Two planets move around the sun. The periodic times and the mean radii of the orbits are T1 , T2and r1 ,r2 respectively. The ratio T1/T2 is equal to (a) ( r1 /r2 )1/2 …
A copper wire of length 4.0m and area of cross-section 1.2 cm2 is stretched with a force of 4.8×103N. If Young’s modulus for copper is .2×1011 N/m2 the increase in the length of the wire will be (a) 1.33 mm …
A planet moves around the sun. At a given point P, it is closest from the sun at a distance d1 and has a speed v1 . At another point Q, when it is farthest from the sun at a distance …
If the interatomic spacing in a steel wire is 3.0Å and Ysteel =20×1010 N/m2 then force constant is (a) 6×10-2 N/Å (b) 6×10-9 N/Å (c) 4×10-5 N/Å (d) 6×10-5 N/Å Answer-b (19)
The earth revolves about the sun in an elliptical orbit with mean radius 9.3 × 107 in a period of 1 year. Assuming that there are no outside influences (a) The earth’s kinetic energy remains constant (b) The earth’s angular …
The figure shows the motion of a planet around the sun in an elliptical orbit with sun at the focus. The shaded areas A and B are also shown in the figure which can be assumed to be equal . …
c HCl molecule about an axis passing through its centre of mass and perpendicular to the line joining the H+ and Cl– ions will be, if the interatomic distance is 1 Å (a) 0.641 x 10-47 kg.m2 (b) 1.61 x …
The distance of neptune 1013 and 1012 saturn from sun are nearly and meters respectively. Assuming that they move in circular orbits, their periodic times will be in the ratio (a) √10 …
When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy, then r and v change as (a) r and v both with increase (b) r and v both …
In planetary motion the areal velocity of position vector of a planet depends on angular velocity (ω) and the distance of the planet from sun (r). If so the correct relation for areal velocity is Answer: c (8)
Two planets at mean distance d1 and d2 from the sun and their frequencies are n1 and n2 respectively then Answer: b (11)
(a) Antheridia (b) Capsule (c) Protonema (d) Archegonium Ans. d (7)
(a) Hydrophobic (b) Sensitive to touch (c) Hygroscopic (d) None of the above Ans. c (5)
Potential energy of a satellite having mass ‘m’ and rotating at a height of 6.4 × 106m from the earth surface is (a) -0.5 mgRe (b) -mgRe (c) -2 …
A satellite with kinetic energy Ek is revolving round the earth in a circular orbit. How much more kinetic energy should be given to it so that it may just escape into outer space (a) Ek (b) 2 Ek …